[NEW] [medium] Grafana Tempo: Multiple vulnerabilities allow Denial of Service
A remote, anonymous attacker can exploit multiple vulnerabilities in Grafana Tempo to conduct a Denial of Service attack.
CSIRTS triage
- What
- Multiple vulnerabilities allow a remote attacker to conduct a Denial of Service attack.
- Who is affected
- Deployments of Grafana Tempo are affected.
- Urgency
- Remediation is medium urgency as exploitation is possible but not currently observed.
- Action
- Update to the latest version of Grafana Tempo.
AI-assisted analysis generated from the source advisory — verify against the original.
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Details
Original advisory: https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2026-2342
Exploitation outlook
EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.
- Low exploitation riskCVE-2026-217280.64% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 47% of all scored CVEs.
- Low exploitation riskCVE-2026-278780.41% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 34% of all scored CVEs.
Referenced CVEs
| CVE | CSIRTS overview | External |
|---|---|---|
| CVE-2026-21728 | coverage & exploitation status | NVD · CVE.org |
| CVE-2026-27878 | coverage & exploitation status | NVD · CVE.org |
Recent advisories for Grafana Tempo
A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.
- highGHSA-ffqx-q65f-36jf: Grafana Tempo has Inadequate Encryption Strengthghsa · 2026-03-27
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